CN213064794U

CN213064794U - Oil smoke discharging fireproof check valve

Info

Publication number: CN213064794U
Application number: CN202021863034.0U
Authority: CN
Inventors: 姚世杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-04-27
Anticipated expiration: 2030-08-31

Abstract

The utility model provides an oil extraction flue gas fire prevention check valve, the on-line screen storage device comprises a base, a valve body, dustcoat and valve block, the valve block is including rotating first valve block and the second valve block of connection on the valve body, be equipped with pressure bar assembly on the fixed bolster of valve body, pressure bar assembly has first compressing arm and second compressing arm, be equipped with in the dustcoat inside with pressure bar assembly matched with fuse-link mechanism, under fuse-link mechanism does not have the fusing state, fuse-link mechanism pins pressure bar assembly and makes first valve block and second valve block freely open, under fuse-link mechanism fusing state, pressure bar assembly can rotate to first compressing arm and second compressing arm and push down respectively and force to close first valve block and second valve block relative fixed bolster. This oil extraction flue gas fire prevention check valve is when fusing takes place for the fuse-link, and the depression bar subassembly can rotate by the relatively fixed bolster, and first compress tightly the arm and compress tightly respectively with the second and force and close first valve block and second valve block, and its novel structure, first valve block and second valve block can be opened simultaneously and close, and the synchronism is good, close very reliably.

Description

Oil smoke discharging fireproof check valve

Technical Field

The utility model relates to a fire prevention valve especially relates to an oil extraction cigarette fire prevention check valve.

Background

In the kitchen using the longitudinal public flue, in order to prevent the oil smoke in the flue from flowing back into the kitchen, a device such as a flue check valve is arranged between the air outlet pipe orifice of the range hood and the public flue. The existing flue check valve generally comprises an oil smoke channel formed by a shell, the oil smoke channel is provided with an air inlet and an air outlet which are opposite, the air inlet is connected with an air outlet pipe orifice of the range hood, the air outlet extends into a public flue gas channel, an openable valve plate is arranged at the air outlet of the oil smoke channel, and the valve plate is rotatably arranged on the inner wall of the oil smoke channel through a valve plate rotating shaft which is horizontally arranged. When the range hood is not used, the valve plate is in a closed position due to the gravity of the valve plate, and the valve plate covers the air outlet part; when the range hood is used, the valve plate is in the opening position, and the valve plate is far away from the air outlet. As a plurality of users share one longitudinal public flue gas channel, once a fire disaster happens to one household, a large amount of high-temperature harmful gas flows into the longitudinal public flue gas channel, and if a valve plate in a flue check valve is not closed in time, the large amount of high-temperature harmful gas can enter the household using the range hood through an oil smoke channel of the flue check valve, so that the life safety of the household is threatened.

For example, in the "flue fire damper for a range hood" disclosed in application No. 201510675514.1 (application publication No. CN 105240582A), the forced closing rod of the flue fire damper is limited on the second bracket by the deformation piece when the deformation piece is not deformed, the deformation piece is deformed by heat, and then the limit on the forced closing rod is released, and the forced closing rod acts on the fire damper under the action of the elastic piece, so that the fire damper is forcibly closed to isolate fire. Because the valve plate can only be closed from the outside of the valve plate, when a fire disaster occurs at a user house, a large amount of high-temperature harmful gas flows into the public flue, the loss of the high-temperature harmful gas can not be blocked from the source, and the life safety of other users is threatened. As disclosed in chinese patent application No. ZL 200910017260.9 (No. CN 101608702A), the present invention provides a flue check fire damper, which includes a smoke channel formed by a housing, the smoke channel has an air inlet and an air outlet opposite to each other, a valve plate is disposed in the smoke channel, the valve plate is disposed in two pieces opposite to each other, the valve plate is rotatably disposed in the smoke channel through a valve plate rotating shaft, a blocking member is disposed in the smoke channel near the air inlet to open the two valve plates only in the direction of the air outlet, a longitudinally disposed connecting strip is disposed in the smoke channel near the air inlet to divide the air inlet into two parts, the valve plate rotating shaft is near the connecting strip, and a high temperature closing device is disposed on the side of the connecting strip facing the air outlet to forcibly close the valve plate. Although the fire damper can be forcibly closed when the temperature of smoke in the public smoke flue is in a high emergency state, the structure of the fire damper is relatively complex, and the valve plate is not reliable enough to close the air inlet under the emergency state.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to above-mentioned prior art current situation, provide a range hood gas fire prevention check valve that simple structure, valve block can reliably close.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: this oil extraction flue gas fire prevention check valve, including base, valve body, dustcoat and valve block, the pedestal mounting be in the outside of dustcoat, the valve body is installed inside the dustcoat, its characterized in that: the valve block is connected including rotating first valve block and the second valve block on the valve body be equipped with the fixed bolster on the valve body, be equipped with the depression bar subassembly on the fixed bolster, the depression bar subassembly has first compress tightly the arm and the second compresses tightly the arm the dustcoat is inside to be equipped with depression bar subassembly matched with fuse-link mechanism, and under fuse-link mechanism's not fused state, fuse-link mechanism pins the depression bar subassembly and makes first valve block and second valve block freely open, and under fuse-link mechanism fused state, the depression bar subassembly can rotate to first compress tightly the arm and the second compresses tightly the arm and push down respectively and force to close first valve block and second valve block relative to the fixed bolster.

The pressure lever assembly can have various structures, and preferably comprises a U-shaped pressure lever and a torsion spring matched with the U-shaped pressure lever, wherein the first pressing arm and the second pressing arm are formed by two side arms of the U-shaped pressure lever, and the torsion spring acts on the U-shaped pressure lever to ensure that the U-shaped pressure lever keeps the tendency of rotating relative to the fixed support to forcibly close the first valve plate and the second valve plate.

Further preferably, the fixed bolster has depression bar installation arm, installs the arm from last installation arm that depression bar installation arm top inwards extended and installs the lower installation arm from depression bar installation arm bottom inwards extended, go up the installation arm and install the top at the valve body, install the bottom at the valve body down by the arm, the vertical outside of locating the valve body of depression bar installation arm, the middle part inboard of depression bar installation arm installs the torsional spring installing support, the torsional spring is installed on the torsional spring installing support, the middle part of U type depression bar is rotated and is connected on the torsional spring installing support, the both ends of torsional spring are installed on the U type depression bar.

The fuse-link can have multiple structures, preferably, the fuse-link includes movable rod, first temperature-sensing element, second temperature-sensing element, temperature-sensing element mount pad and elastic component, first temperature-sensing element is installed the inner end of movable rod is spacing on the valve body, second temperature-sensing element installs on the temperature-sensing element mount pad and pins U type depression bar, the temperature-sensing element mount pad has the ascending draw-in groove of opening, the movable rod card is established on the draw-in groove, the middle part of movable rod has the throat, the external diameter of throat is less than the width of draw-in groove, the elastic component is installed in the outer end of movable rod and makes the movable rod keep having the trend of outside removal. After the structure is adopted, as long as one of the first temperature sensing element and the second temperature sensing element is fused, the pressure lever assembly can be released, and then the first valve plate and the second valve plate are pressed and closed.

Preferably, the outer end of the movable rod extends outwards to the outside of the pressure rod mounting arm, the head of the outer end of the movable rod is provided with a radial bolt, the temperature sensing element mounting seat is arranged on the outside of the pressure rod mounting arm, the elastic part is a spring sleeved on the outer end of the movable rod, and the spring is limited between the temperature sensing element mounting seat and the radial bolt. Therefore, as long as one of the first temperature sensing element and the second temperature sensing element is fused, the spring can smoothly drive the movable rod to move outwards, and the pressure rod assembly is released.

In order to enable the temperature sensing element mounting seat to fall off quickly after the movable rod moves, the clamping groove is a U-shaped groove.

Preferably, as for any one of the above schemes, a first rotating shaft and a second rotating shaft which are parallel to each other are installed in the middle of the valve body, the first valve plate is installed on the first rotating shaft, and the second valve plate is installed on the second rotating shaft.

Compared with the prior art, the utility model has the advantages of: this oil extraction flue gas fire prevention check valve installs the depression bar subassembly with fuse mechanism matched with on the fixed bolster of valve body, fuse mechanism is not under the fusing state, first valve block and second valve block can freely be opened, in case the fusing just takes place the fusing, the depression bar subassembly can rotate by the relatively fixed bolster after being released, and then make its first pressure arm and second pressure arm compress tightly respectively and force and close first valve block and second valve block, it is comparatively novel to see this fire prevention check valve structure, first valve block and second valve block can be opened simultaneously and close, the synchronism is good, it is very reliable to close.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of another angle of the fire check valve of FIG. 1;

FIG. 3 is a schematic view of the fire check valve of FIG. 1 with the base and cover removed;

FIG. 4 is a schematic view of the structure of FIG. 3 from another angle;

FIG. 5 is an enlarged view of portion A of FIG. 4;

fig. 6 is a schematic structural diagram of the present invention in a state where the first valve plate and the second valve are forcibly closed.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 6, the fire-proof check valve for discharging oil smoke of the present embodiment includes a base 1, a valve body 2, an outer cover 3, a first valve plate 41, a second valve plate 42, a fixing bracket 5, a pressing rod assembly 6, a fusing mechanism 7, a torsion spring mounting bracket 8, a first rotating shaft 91, a second rotating shaft 92, and other main components.

Wherein, base 1 installs in the outside of dustcoat 3, and valve body 2 installs inside dustcoat 3, and first pivot 91 and the vertical parallel arrangement of second pivot 92 are at the 2 middle parts of valve body, and first valve block 41 is installed on first pivot 91, and second valve block 42 is installed on second pivot 92, and from this, first valve block 41 and second valve block 42 can rotate 2 relative valve bodies, realize opening and closing.

Fixed bolster 5 is the U type, and fixed bolster 5 has depression bar installation arm 51, installs arm 52 and the lower installation arm 53 that inwards extends from depression bar installation arm bottom on installing arm 52 and the inwards extension from depression bar installation arm top on the depression bar installation arm 5, and wherein, the vertical outside of locating valve body 2 of depression bar installation arm 51 is gone up installation arm 52 and is installed at the top of valve body 2, installs arm 53 down and installs in the bottom of valve body 2, and torsional spring installing support 8 is installed to the middle part inboard of depression bar installation arm 51.

The pressing rod assembly 6 of the embodiment comprises a U-shaped pressing rod 61 and a torsion spring 62, wherein a first pressing arm 611 and a second pressing arm 612 are formed on two side arms of the U-shaped pressing rod 61, and the middle part of the U-shaped pressing rod 61 is rotatably connected to the torsion spring mounting bracket 8. The torsion spring 62 is installed on the torsion spring installation bracket 8, two ends of the torsion spring 62 are installed on the U-shaped pressure lever 61, and under the action of the torsion spring 62, the U-shaped pressure lever 61 keeps a trend of rotating relative to the fixed bracket 5 to forcibly close the first valve plate 41 and the second valve plate 42.

The fuse mechanism 7 of the present embodiment includes a movable lever 71, a first temperature sensing element 72, a second temperature sensing element 73, a temperature sensing element mount 74, and a spring 75. The first temperature sensing element 72 and the second temperature sensing element 73 both adopt fuse links, and when the corresponding melting points are reached, the fuse links can be fused. The first temperature sensing element 72 is mounted at the inner end of the movable rod 71 and limited on the valve body 2, the upper part of the second temperature sensing element 73 is mounted on the temperature sensing element mounting seat 74 and locks the U-shaped pressure rod 61, the temperature sensing element mounting seat 74 is provided with a clamping groove 741 with an upward opening, and the clamping groove 741 in the embodiment is a U-shaped groove. The movable rod 71 is clamped on the clamping groove 741, a necking part 711 is arranged in the middle of the movable rod 71, the outer diameter of the necking part 711 is smaller than the width of the clamping groove 741, and the spring 75 is installed at the outer end of the movable rod 71 and enables the movable rod 71 to keep a trend of moving outwards.

The mounting structure of the spring 75 is as follows:

the outer end of the movable rod 71 extends outwards to the outer side of the press rod mounting arm 51, the head of the outer end of the movable rod 71 is provided with a radial bolt 76, the temperature sensing element mounting seat 74 is arranged on the outer side of the press rod mounting arm 51, the spring 75 is sleeved at the outer end of the movable rod 71, and the spring 75 is limited between the temperature sensing element mounting seat 74 and the radial bolt 76. Specifically, a first washer 77 is installed between the inner end of the spring 75 and the temperature sensing element mounting seat 74, a second washer 78 is installed between the outer end of the spring 75 and the radial plug 76, the inner end of the spring 75 abuts against the first washer 77, and the outer end of the spring 75 abuts against the second washer 78.

As shown in fig. 1 to 5, when abnormal conditions such as fire do not occur, the temperature of the kitchen and the public flue is low, the first temperature sensing element 72 and the second temperature sensing element 73 are not fused, at this time, the second temperature sensing element 73 locks the pressing rod assembly 6, at this time, the U-shaped pressing rod 61 is in the vertical position and avoids the first valve plate 41 and the second valve plate 42, so that the first valve plate 41 and the second valve plate 42 can be smoothly opened under the action of flue gas flow

When fire and other abnormal conditions occur in a kitchen, the temperature in the kitchen rises, when the temperature near the first temperature sensing element 72, namely the temperature inside the check valve reaches the melting point of the first temperature sensing element 72, the first temperature sensing element 72 is fused, the movable rod 71 moves outwards under the action of the elastic force of the spring 75, when the movable rod 71 moves to the position that the necking part 711 is positioned in the clamping groove 741 of the temperature sensing element mounting seat 74, because the outer diameter of the necking part 711 is smaller than the width of the clamping groove 741, the temperature sensing element mounting seat 74 is separated from the movable rod 71, the pressure rod assembly 6 is released, at this time, under the action of the torsion spring 62, the U-shaped pressure rod 61 rotates relative to the fixed support 5, the first pressure arm 611 of the U-shaped pressure rod 61 presses and forcibly closes the first valve plate 41, and simultaneously, the second pressure arm 612 presses and forcibly closes the second valve plate 42, thereby preventing high-temperature smoke from entering the.

As shown in fig. 6, when other users have abnormal conditions such as fire, high-temperature smoke enters the common flue to cause the flue temperature to be higher, when the temperature near the second temperature sensing element 73, that is, the temperature outside the check valve reaches the melting point of the second temperature sensing element 73, the second temperature sensing element 73 is fused, the press rod assembly 6 is released, at this time, under the action of the torsion spring 62, the U-shaped press rod 61 rotates relative to the fixed bracket 5, the first press arm 611 of the U-shaped press rod 61 presses and forcibly closes the first valve plate 41, and at the same time, the second press arm 612 presses and forcibly closes the second valve plate 42, so that the high-temperature smoke in the common flue is prevented from entering the homes of the users.

Claims

1. The utility model provides an oil extraction flue gas fire prevention check valve, includes base (1), valve body (2), dustcoat (3) and valve block, install base (1) the outside of dustcoat (3), install inside dustcoat (3) valve body (2), its characterized in that: the valve plate comprises a first valve plate (41) and a second valve plate (42) which are rotationally connected with the valve body (2), a fixed bracket (5) is arranged on the valve body (2), a pressure lever component (6) is arranged on the fixed bracket (5), the plunger assembly (6) has a first pressure arm (611) and a second pressure arm (612), a fusing mechanism (7) matched with the pressure lever component (6) is arranged in the outer cover (3), when the fusing mechanism (7) is not fused, the fusing mechanism (7) locks the pressure lever component (6) to enable the first valve plate (41) and the second valve plate (42) to be freely opened, under the fusing state of the fusing mechanism (7), the pressure lever assembly (6) can rotate relative to the fixed support (5) to the first pressing arm (611) and the second pressing arm (612) to respectively press and forcibly close the first valve plate (41) and the second valve plate (42).

2. The range hood fire check valve of claim 1, wherein: the pressure lever assembly (6) comprises a U-shaped pressure lever (61) and a torsion spring (62) matched with the U-shaped pressure lever, two side arms of the U-shaped pressure lever (61) form a first pressing arm (611) and a second pressing arm (612), and the torsion spring (62) acts on the U-shaped pressure lever (61) to enable the U-shaped pressure lever to keep a trend of forcibly closing the first valve plate (41) and the second valve plate (42) relative to the fixed support (5) in a rotating mode.

3. The range hood fire check valve of claim 2, wherein: fixed bolster (5) have depression bar installation arm (51), install arm (52) and install arm (53) from the lower of the inside extension of depression bar installation arm bottom on installing arm (52) and installing the top at valve body (2) from the inside extension of depression bar installation arm top, install arm (52) down and install the bottom at valve body (2), the vertical outside of locating valve body (2) in depression bar installation arm (51), torsion spring installing support (8) are installed to the middle part inboard of depression bar installation arm (51), install torsional spring (62) on torsion spring installing support (8), the rotation of the middle part of U type depression bar (61) is connected on torsion spring installing support (8), install at the both ends of torsional spring (62) on U type depression bar (61).

4. The range hood fire check valve of claim 3, wherein: fuse-link mechanism (7) include movable rod (71), first temperature-sensing element (72), second temperature-sensing element (73), temperature-sensing element mount pad (74) and elastic component, first temperature-sensing element (72) are installed the inner end of movable rod (71) and spacing on valve body (2), second temperature-sensing element (73) are installed on the temperature-sensing element mount pad and are locked U type depression bar (61), temperature-sensing element mount pad (74) have ascending draw-in groove (741) of opening, movable rod (71) card is established on draw-in groove (741), the middle part of movable rod (71) has necking portion (711), the external diameter of necking portion (711) is less than the width of draw-in groove (741), the elastic component is installed in the outer end of movable rod (71) and makes the movable rod keep having the trend of outside removal.

5. The range hood fire check valve of claim 4, wherein: the outer end part of the movable rod (71) extends outwards to the outer side of the pressure rod mounting arm (51), the head part of the outer end of the movable rod (71) is provided with a radial bolt (76), the temperature sensing element mounting seat (74) is arranged on the outer side of the pressure rod mounting arm, the elastic part is a spring (75) sleeved on the outer end part of the movable rod (71), and the spring (75) is limited between the temperature sensing element mounting seat (74) and the radial bolt (76).

6. The range hood fire check valve of claim 4, wherein: the clamping groove (741) is a U-shaped groove.

7. The range hood fire check valve of any one of claims 1 to 6, wherein: the middle part of the valve body (2) is provided with a first rotating shaft (91) and a second rotating shaft (92) which are parallel to each other, the first valve plate (41) is arranged on the first rotating shaft (91), and the second valve plate (42) is arranged on the second rotating shaft (92).